超临界氢用空温式气化器的传热特性研究
Research on Heat Transfer Characteristics of Air Ambient Vaporizer for Supercritical Hydrogen
刘家宁 1杨靖丞 1钟文荣 2师存阳 1吴昊 1唐建伟 2钱学峰 2薛明喆 1朱绍伟 3张存满1
作者信息
- 1. 同济大学汽车学院新能源汽车工程中心,上海 201804
- 2. 苏州新锐低温设备有限公司,江苏 苏州 215105
- 3. 同济大学机械与能源工程学院制冷与低温工程研究所,上海 201804
- 折叠
摘要
液氢具有高密度、可常压下保存的优点,比高压气氢更适合于储存和运输.在目前的液态储存气态加注型加氢站中,储存的液氢需要增压和气化,在空温式气化器中变成高压气态超临界氢后才可加注.对于空温式气化器的设计,目前仅有基础的传热学计算公式作为指导,缺乏对高压(45 MPa)超临界流体所用的特殊结构气化器传热特性的探究.采用数值模拟方法,利用Fluent软件对包括内外流场和管壁固体域在内的整体耦合传热模型进行计算.以得到的总体传热系数为参考,对气化器的特殊结构、空气域的温度和流动状态、超临界氢流域的入口温度和流量进行探究.探究结果有助于相似气化器的设计计算,也为气化器在实际运行时的总体布置提供参考.
Abstract
Liquid hydrogen has the advantages of high density and being able to be stored at atmospheric pressure,mak-ing it more suitable for storage and transportation than high-pressure gaseous hydrogen.In current liquid storage gas refuel-ing hydrogen refueling stations,the stored liquid hydrogen needs to be pressurized and gasified,and can only be used for fue-ling after being transformed into high-pressure gaseous supercritical hydrogen in an Air Ambient Vaporizer(AAV).For the design of AAV,currently only basic heat transfer calculation formulas are used as guidance,and there is a lack of explo-ration of the heat transfer characteristics of specialized vaporizer used for high-pressure(45 MPa)supercritical fluids.The numerical simulation methods and Fluent software were used to calculate the overall coupled heat transfer model,including the internal and external flow fields and the solid domain of the pipe wall.Using the obtained overall heat transfer coefficient as a reference,the special structure of the vaporizer,the temperature and flow state of the air domain,and the inlet tempera-ture and flow rate of the supercritical hydrogen were discussed.The results are helpful for the design and calculation of simi-lar vaporizers,and also provide reference for the overall layout of vaporizers during actual operation.
关键词
高压超临界氢/空温式气化器/流固耦合传热/数值模拟Key words
high-pressure supercritical hydrogen/AAV/fluid structure coupling heat transfer/numerical simulation引用本文复制引用
基金项目
国家重点研发计划(2020YFB1506204)
出版年
2024
NETL
NSTL
万方数据